What is CVE-2023-54173?

CVE-2023-54173 is a unscored severity Linux kernel vulnerability, affecting Linux kernel versions from 5.7 onward and patched in 5.10.190, 5.15.126, 6.1.45 and others. CVE-2023-54173 has not been confirmed as actively exploited and is not listed in the CISA KEV catalog.

What is the CVSS score for CVE-2023-54173?

CVE-2023-54173 has a CVSS score of pending NVD analysis out of 10, rated awaiting scoring severity.

Is there a patch available for CVE-2023-54173?

Yes, CVE-2023-54173 has been patched. Fixed versions include 5.10.190, 5.15.126, 6.1.45 and others. If you are running Linux kernel 5.7 or later up to the fix versions, apply the relevant patch for your kernel branch.

Is CVE-2023-54173 actively exploited?

CVE-2023-54173 has not been confirmed as actively exploited and is not listed in the CISA KEV catalog.

CVE-2023-54173

In the Linux kernel, the following vulnerability has been resolved: bpf: Disable preemption in bpf_event_output We received report [1] of kernel crash, which is caused by using nesting protection without disabled preemption. The bpf_event_output can be called by programs executed by bpf_prog_run_array_cg function that disabled migration but keeps preemption enabled. This can cause task to be preempted by another one inside the nesting protection and lead eventually to two tasks using same perf_sample_data buffer and cause crashes like: BUG: kernel NULL pointer dereference, address: 0000000000000001 #PF: supervisor instruction fetch in kernel mode #PF: error_code(0x0010) - not-present page ... ? perf_output_sample+0x12a/0x9a0 ? finish_task_switch.isra.0+0x81/0x280 ? perf_event_output+0x66/0xa0 ? bpf_event_output+0x13a/0x190 ? bpf_event_output_data+0x22/0x40 ? bpf_prog_dfc84bbde731b257_cil_sock4_connect+0x40a/0xacb ? xa_load+0x87/0xe0 ? __cgroup_bpf_run_filter_sock_addr+0xc1/0x1a0 ? release_sock+0x3e/0x90 ? sk_setsockopt+0x1a1/0x12f0 ? udp_pre_connect+0x36/0x50 ? inet_dgram_connect+0x93/0xa0 ? __sys_connect+0xb4/0xe0 ? udp_setsockopt+0x27/0x40 ? __pfx_udp_push_pending_frames+0x10/0x10 ? __sys_setsockopt+0xdf/0x1a0 ? __x64_sys_connect+0xf/0x20 ? do_syscall_64+0x3a/0x90 ? entry_SYSCALL_64_after_hwframe+0x72/0xdc Fixing this by disabling preemption in bpf_event_output. [1] https://github.com/cilium/cilium/issues/26756

Package Linux Kernel

Published 2025-12-30

Last modified 2026-04-15

Patch available

Yes

Affected versions

Linux kernel versions 5.7 and later are affected. Fixed in 5.10.190, 5.15.126, 6.1.45, 6.4.10, 6.5 and their respective stable series.

Affected from

≥ 5.7

Fixed in

✓ 5.10.190 5.10.x ✓ 5.15.126 5.15.x ✓ 6.1.45 6.1.x ✓ 6.4.10 6.4.x ✓ 6.5

References

The following references provide additional information about CVE-2023-54173 including vendor advisories, patch commits, exploit details, and third-party analysis. Links are sourced from the NIST NVD database.

Kernel patch commit
https://git.kernel.org/stable/c/063c9ce8e74e07bf94f99cd13146f42867875e8b
Patch
Kernel patch commit
https://git.kernel.org/stable/c/3048cb0dc0cc9dc74ed93690dffef00733bcad5b
Patch
Kernel patch commit
https://git.kernel.org/stable/c/36dd8ca330b76585640ed32255a3c99f901e1502
Patch

5 patch commits total View all on NVD

Frequently asked questions

What is CVE-2023-54173?

CVE-2023-54173 is a unscored severity Linux kernel vulnerability . It affects Linux kernel versions from 5.7 onward and has been patched in 5.10.190, 5.15.126, 6.1.45 and others. CVE-2023-54173 has not been confirmed as actively exploited and is not listed in the CISA KEV catalog.
Is there a patch available for CVE-2023-54173?

Yes — CVE-2023-54173 has been patched. Fixed versions include 5.10.190, 5.15.126, 6.1.45 and others. If you are running Linux kernel 5.7 or later up to the fix versions, apply the relevant patch for your kernel branch.
Is CVE-2023-54173 actively exploited?

No — CVE-2023-54173 has not been confirmed as actively exploited. It is not listed in the CISA Known Exploited Vulnerabilities (KEV) catalog.